In figure, a long wire AB is placed on a table. A wire CD `10cm` long, is just above AB. It can slide up and down on two vertical wires. If the wires carry a current of `20A`, then how much above AB, will the wire CD settle? The mass of the wire CD is `0*50` gram.

A long wire AB is placed on a table. Another wire PQ of mass 1.0 g and length 50cm is set to slide on two rails PS and QR . A current of 50 A is passed through the wires. At what distance above AB , will the wire PQ be in equilibrium?

A long wire AB is placed on a table. Another wire PQ of mass 1.0 g and length 50cm is set to slide on two rails PS and QR . A current of 50 A is passed through the wires. At what distance above AB , will the wire PQ be in equilibrium?

A long straight wire carries a current of 35A . What is the magnetic of the field vecB at a point 20cm from the wire?

A current I_(1) carrying wire AB is placed near another long wire CD carrying current I_(2) . If wire AB is free to move, it will have

A current I_(1) carrying wire AB is placed near another long wire CD carrying current I_(2) . If wire AB is free to move, it will have

A long, horizontal wire AB rests on the surface of a table and carries a current I. Horizontal wire CD is vertically above wire AB, and is free to slide up and down on the two vetical mental guides C and D (as shown in Fig) Wire CD is connected through the sliding contacts to another wire that also carries a current I, opposite in direction to the current in wire AB. The mass per unit length of the wire CD is lambda . To what euqilibrium heigth h will the wire CD rise, assuming that magnetic force on it is wholly due to the current in wire AB?

A long, horizontal wire AB rests on the surface of a table and carries a current I. Horizontal wire CD is vertically above wire AB, and is free to slide up and down on the two vetical mental guides C and D (as shown in Fig) Wire CD is connected through the sliding contacts to another wire that also carries a current I, opposite in direction to the current in wire AB. The mass per unit length of the wire CD is lambda . To what euqilibrium heigth h will the wire CD rise, assuming that magnetic force on it is wholly due to the current in wire AB?